Dayco 71239 Radiator Coolant Hose - Upper or Upper - Engine To Pipe

Dayco Curved Radiator Hose for Ford Ranger

Dayco Part Number 71239 is a curved radiator coolant hose built for upper cooling-system routing on select Ford Ranger applications. Made from EPDM rubber and finished in black, it is shaped as a dual I.D. hose to match the connection sizes used in the vehicle’s cooling circuit.

Compatible with 1985-1989 Ford Ranger, upper position, this hose is specified to SAE J20R4 Class D-1 and SAE J1684 Type EC standards. If you are replacing a worn upper radiator hose on a Ford Ranger, Part Number 71239 provides the correct curved profile and dual-diameter fitment for the listed application.

Key Features

• EPDM construction for coolant-hose service
• Black finish for OE-style appearance
• Dual I.D. hose design
• End 1 inside diameter: 1 3/16 in.
• End 2 inside diameter: 1 13/32 in.
• Trunk height: 15 1/2 in.
• Meets SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
• Fits upper radiator hose applications on select Ford Ranger models

Product Details

Dayco’s Curved Radiator Hose line is built for vehicle-specific cooling-system routing where a formed hose is required to maintain proper alignment and flow path. This Part Number 71239 hose is shaped for the upper radiator connection on 1985-1989 Ford Ranger models and uses a dual inside diameter design to match the different connection sizes at each end. The EPDM rubber construction is suited for coolant exposure and everyday engine-bay temperatures, while the curved profile helps replicate the original hose routing on the Ford Ranger.

This part cross-references Motorcraft KM1518 and Gates 21430 for the same application.

What It Helps Address

• Cracked or hardened upper radiator hose material
• Coolant leaks at the hose connection points
• Improper hose routing from a collapsed or misshaped hose
• Cooling-system service on a Ford Ranger upper hose location
• Replacement of a worn dual-diameter radiator hose

Installation Notes and Tips

Verify the hose routing, end diameters, and upper-position application before installation. Inspect the radiator neck and engine-side connection for corrosion, debris, or sharp edges that could affect sealing. Replace clamps if they are worn or no longer hold proper tension, and confirm the hose is seated fully before refilling and bleeding the cooling system.

Quality Assurance

Dayco specifies this hose to SAE J20R4 Class D-1 and SAE J1684 Type EC standards, supporting consistent material and dimensional requirements for radiator coolant hose service.